氧化石墨烯/聚合物基复合膜对水, 氨水与二氯甲烷的渗透性

Permeation of water,ammonia and dichloromethane through graphene oxide/polymeric matrix composite membranes Ali Asghar

以氧化石墨烯(GO)、聚氨酯(PU)和亲水性聚2-丙烯酰胺-2-甲基丙烷磺酸(PAMPS)为原料,制备出无支撑的PU基复合膜和PAMPS基复合膜。研究氧化石墨烯聚合物基膜用于含极性材料废液如水、氨水、以及含非极性二氯甲烷和氨-二氯甲烷混合废液的渗透行为。采用不同表征方法如X射线衍射仪(XRD)、接触角、场发射扫描电子显微镜(FESEM)、红外光谱仪(FT-IR)和力学性能测试仪来评价所制复合膜的综合性能。采用ASTM E96/96-M14设备进行复合膜的渗透测试。结果表明,PAMPS基复合膜因较高的亲水性,具有最佳的水和氨渗透性能,而PU基复合膜具有最佳的二氯甲烷渗透性,最差的水和氨的渗透性。

The permeation of polar molecules(water and ammonia),non-polar dichloromethane and a mixture of ammonia and dichloromethane through graphene oxide(GO)/polymer matrix composite membranes was investigated.Results indicated that a hydrophilic poly(2-acrylamido-2-methyl propane sulfonic acid)(PAMPS)based membrane had the highest permeability for water and ammonia due to the high hydrophilicity of the polymer matrix while a hydrophobic polyurethane(PU)-based membrane had the best permeation performance for dichloromethane and the worst performance for water and ammonia.Adding the GO to PU or PAMPS polymers increases the negative charge due to the negatively charged nature of GO caused by its oxygen-containing functional groups,which increases the amounts of absorbed water and ammonia due to the positive charge of the hydrogen atoms in these two molecules.